最后64点FFT

verilog code for dma

说明：  使用FPGA实现sobel边缘检测的图像处理算法，更改后可直接使用在自己的系统上。(FPGA is used to implement the image processing algorithm of Sobel edge detection, which can be directly used in its own system after change.)

turbo码的编码程序,verilog HDL,在ISE环境中(turbo code encoding process)

根据软件无线电的思想，提出了一种新颖的数字信号处理算法，对QPSK信号的相位进行数字化处理，从而实现对QPSK信号的解调.该算法允许收发两端载波存在频差，用数字锁相实现收发端载波的同步，在频偏较大的情况下，估算频偏的大小，自适应设置环路的带宽，实现较短的捕获时间和较好的信噪性能。整个设计基于XILINX公司的ISE开发平台，并用Virtex-II系列FPGA实现。用FPGA实现调制解调器具有体积小、功耗低、集成度高、可软件升级、扰干扰能力强的特点，符合未来通信技术发展的方向。(According to the idea of software radio, a novel digital signal processing algorithm, the phase of QPSK digital signal processing, enabling the demodulation of QPSK signals. This algorithm allows the sending and receiving ends of the carrier frequency difference exists, using digital phase-locked to achieve synchronization of sending and receiving end of the carrier, in the case of large frequency offset, frequency offset estimation of the size, adaptive set the loop bandwidth to achieve shorter acquisition time and better noise performance. The whole design is based on the company XILINX ISE development platform, and Virtex-II series with the FPGA. FPGA realization of a modem with a small size, low power consumption, high integration, software upgrades available, the characteristics of strong interference interference, in line with the future direction of ICT development.)

用VHDL实现自动售货机，可供毕业设计参考。可以输入硬币和纸币，硬币的识别范围是5角和1 元的硬币，纸币的识别范围是1 元、5 元，10 元，20元，50元，100元。可以连续多次投入钱币。可以选择的商品种类有16种，价格分别为1-16元，顾客可以通过输入商品的编号来实现商品的选择。 即有一个小键盘（0-9按键）来完成，比如输入15时要先输入1，再输入5。顾客选择完商品后，可以选择需要的数量。每次可以选择最多三个商品。然后显示出所需金额和已投币总币值。在投币期间，顾客可以按取消键取消本次操作，钱币自动退出。

8选1程序，是利用vhdl编写的，自己弄得还能用，上传下(8 Select a program is written using vhdl, allowed herself can use to upload the next)

these are the source codes for the book " 100 power tips for FPGA designers"

用FPGA实现dct变换。verilog语言实现，在quartus9.0中验证，含整个工程(dct transform verilog language in quartus9.0 verify, with the entire project)

74ls138组成16..4线编码器 经过本人验证(74ls138 composed of 16 .. 4 line encoder after I verify)

build synthesizer on a de2 dev fpga board